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llvm-mirror/test/CodeGen/PowerPC/vec-itofp.ll
QingShan Zhang 2f3956c41c [Power9] Enable the Out-of-Order scheduling model for P9 hw 
When switched to the MI scheduler for P9, the hardware is modeled as out of order.
However, inside the MI Scheduler algorithm, we still use the in-order scheduling model
as the MicroOpBufferSize isn't set. The MI scheduler take it as the hw cannot buffer
the op. So, only when all the available instructions issued, the pending instruction
could be scheduled. That is not true for our P9 hw in fact.

This patch is trying to enable the Out-of-Order scheduling model. The buffer size 44 is
picked from the P9 hw spec, and the perf test indicate that, its value won't hurt the cpu2017.

With this patch, there are 3 specs improved over 3% and 1 spec deg over 3%. The detail is as follows:

x264_r: +6.95%
cactuBSSN_r: +6.94%
lbm_r: +4.11%
xz_r: -3.85%

And the GEOMEAN for all the C/C++ spec in spec2017 is about 0.18% improved. 

Reviewer: Nemanjai
Differential Revision: https://reviews.llvm.org/D55810

llvm-svn: 350285
2019-01-03 05:04:18 +00:00

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; RUN: llc -verify-machineinstrs -mtriple=powerpc64le-unknown-linux-gnu \
; RUN: -mcpu=pwr8 -ppc-asm-full-reg-names -ppc-vsr-nums-as-vr < %s | \
; RUN: FileCheck %s --check-prefix=CHECK-P8
; RUN: llc -verify-machineinstrs -mtriple=powerpc64le-unknown-linux-gnu \
; RUN: -mcpu=pwr9 -ppc-asm-full-reg-names -ppc-vsr-nums-as-vr < %s | \
; RUN: FileCheck %s --check-prefix=CHECK-P9
; RUN: llc -verify-machineinstrs -mtriple=powerpc64-unknown-linux-gnu \
; RUN: -mcpu=pwr9 -ppc-asm-full-reg-names -ppc-vsr-nums-as-vr < %s | \
; RUN: FileCheck %s --check-prefix=CHECK-BE
define void @test8(<8 x double>* nocapture %Sink, <8 x i16>* nocapture readonly %SrcPtr) {
entry:
%0 = load <8 x i16>, <8 x i16>* %SrcPtr, align 16
%1 = uitofp <8 x i16> %0 to <8 x double>
store <8 x double> %1, <8 x double>* %Sink, align 16
ret void
; CHECK-P9-LABEL: @test8
; CHECK-P9: vperm
; CHECK-P9: xvcvuxddp
; CHECK-P9: vperm
; CHECK-P9: xvcvuxddp
; CHECK-P9: vperm
; CHECK-P9: xvcvuxddp
; CHECK-P9: vperm
; CHECK-P9: xvcvuxddp
; CHECK-P8-LABEL: @test8
; CHECK-P8: vperm
; CHECK-P8: vperm
; CHECK-P8: vperm
; CHECK-P8: vperm
; CHECK-P8: xvcvuxddp
; CHECK-P8: xvcvuxddp
; CHECK-P8: xvcvuxddp
; CHECK-P8: xvcvuxddp
}
define void @test4(<4 x double>* nocapture %Sink, <4 x i16>* nocapture readonly %SrcPtr) {
entry:
%0 = load <4 x i16>, <4 x i16>* %SrcPtr, align 16
%1 = uitofp <4 x i16> %0 to <4 x double>
store <4 x double> %1, <4 x double>* %Sink, align 16
ret void
; CHECK-P9-LABEL: @test4
; CHECK-P9: vperm
; CHECK-P9: xvcvuxddp
; CHECK-P9: vperm
; CHECK-P9: xvcvuxddp
; CHECK-P8-LABEL: @test4
; CHECK-P8: vperm
; CHECK-P8: vperm
; CHECK-P8: xvcvuxddp
; CHECK-P8: xvcvuxddp
}
define void @test2(<2 x double>* nocapture %Sink, <2 x i16>* nocapture readonly %SrcPtr) {
entry:
%0 = load <2 x i16>, <2 x i16>* %SrcPtr, align 16
%1 = uitofp <2 x i16> %0 to <2 x double>
store <2 x double> %1, <2 x double>* %Sink, align 16
ret void
; CHECK-P9-LABEL: .LCPI2_0:
; CHECK-P9-NEXT: .byte 31
; CHECK-P9-NEXT: .byte 30
; CHECK-P9-NEXT: .byte 13
; CHECK-P9-NEXT: .byte 12
; CHECK-P9-NEXT: .byte 11
; CHECK-P9-NEXT: .byte 10
; CHECK-P9-NEXT: .byte 9
; CHECK-P9-NEXT: .byte 8
; CHECK-P9-NEXT: .byte 29
; CHECK-P9-NEXT: .byte 28
; CHECK-P9-NEXT: .byte 5
; CHECK-P9-NEXT: .byte 4
; CHECK-P9-NEXT: .byte 3
; CHECK-P9-NEXT: .byte 2
; CHECK-P9-NEXT: .byte 1
; CHECK-P9-NEXT: .byte 0
; CHECK-P9: addi [[REG1:r[0-9]+]], {{r[0-9]+}}, .LCPI2_0@toc@l
; CHECK-P9: lxvx [[REG2:v[0-9]+]], 0, [[REG1]]
; CHECK-P9: vperm [[REG3:v[0-9]+]], {{v[0-9]+}}, {{v[0-9]+}}, [[REG2]]
; CHECK-P9: xvcvuxddp {{vs[0-9]+}}, [[REG3]]
; CHECK-P8-LABEL: @test2
; CHECK-P8: vperm [[REG1:v[0-9]+]]
; CHECK-P8: xvcvuxddp {{vs[0-9]+}}, [[REG1]]
; CHECK-BE-LABEL: .LCPI2_0:
; CHECK-BE-NEXT: .byte 16
; CHECK-BE-NEXT: .byte 17
; CHECK-BE-NEXT: .byte 18
; CHECK-BE-NEXT: .byte 19
; CHECK-BE-NEXT: .byte 20
; CHECK-BE-NEXT: .byte 21
; CHECK-BE-NEXT: .byte 0
; CHECK-BE-NEXT: .byte 1
; CHECK-BE-NEXT: .byte 24
; CHECK-BE-NEXT: .byte 25
; CHECK-BE-NEXT: .byte 26
; CHECK-BE-NEXT: .byte 27
; CHECK-BE-NEXT: .byte 28
; CHECK-BE-NEXT: .byte 29
; CHECK-BE-NEXT: .byte 2
; CHECK-BE-NEXT: .byte 3
; CHECK-BE: addi [[REG1:r[0-9]+]], {{r[0-9]+}}, .LCPI2_0@toc@l
; CHECK-BE: lxvx [[REG2:v[0-9]+]], 0, [[REG1]]
; CHECK-BE: vperm [[REG3:v[0-9]+]], {{v[0-9]+}}, {{v[0-9]+}}, [[REG2]]
; CHECK-BE: xvcvuxddp {{vs[0-9]+}}, [[REG3]]
}
define void @stest8(<8 x double>* nocapture %Sink, <8 x i16>* nocapture readonly %SrcPtr) {
entry:
%0 = load <8 x i16>, <8 x i16>* %SrcPtr, align 16
%1 = sitofp <8 x i16> %0 to <8 x double>
store <8 x double> %1, <8 x double>* %Sink, align 16
ret void
; CHECK-P9-LABEL: @stest8
; CHECK-P9: vperm
; CHECK-P9: vextsh2d
; CHECK-P9: xvcvsxddp
; CHECK-P9: vperm
; CHECK-P9: vextsh2d
; CHECK-P9: xvcvsxddp
; CHECK-P9: vperm
; CHECK-P9: vextsh2d
; CHECK-P9: xvcvsxddp
; CHECK-P9: vperm
; CHECK-P9: vextsh2d
; CHECK-P9: xvcvsxddp
}
define void @stest4(<4 x double>* nocapture %Sink, <4 x i16>* nocapture readonly %SrcPtr) {
entry:
%0 = load <4 x i16>, <4 x i16>* %SrcPtr, align 16
%1 = sitofp <4 x i16> %0 to <4 x double>
store <4 x double> %1, <4 x double>* %Sink, align 16
ret void
; CHECK-P9-LABEL: @stest4
; CHECK-P9: vperm
; CHECK-P9: vextsh2d
; CHECK-P9: xvcvsxddp
; CHECK-P9: vperm
; CHECK-P9: vextsh2d
; CHECK-P9: xvcvsxddp
}
define void @stest2(<2 x double>* nocapture %Sink, <2 x i16>* nocapture readonly %SrcPtr) {
entry:
%0 = load <2 x i16>, <2 x i16>* %SrcPtr, align 16
%1 = sitofp <2 x i16> %0 to <2 x double>
store <2 x double> %1, <2 x double>* %Sink, align 16
ret void
; CHECK-P9-LABEL: .LCPI5_0:
; CHECK-P9-NEXT: .byte 31
; CHECK-P9-NEXT: .byte 30
; CHECK-P9-NEXT: .byte 31
; CHECK-P9-NEXT: .byte 31
; CHECK-P9-NEXT: .byte 31
; CHECK-P9-NEXT: .byte 31
; CHECK-P9-NEXT: .byte 31
; CHECK-P9-NEXT: .byte 31
; CHECK-P9-NEXT: .byte 29
; CHECK-P9-NEXT: .byte 28
; CHECK-P9-NEXT: .byte 31
; CHECK-P9-NEXT: .byte 31
; CHECK-P9-NEXT: .byte 31
; CHECK-P9-NEXT: .byte 31
; CHECK-P9-NEXT: .byte 31
; CHECK-P9-NEXT: .byte 31
; CHECK-P9: vperm [[REG1:v[0-9]+]]
; CHECK-P9: vextsh2d [[REG2:v[0-9]+]], [[REG1]]
; CHECK-P9: xvcvsxddp {{vs[0-9]+}}, [[REG2]]
; CHECK-BE-LABEL: .LCPI5_0:
; CHECK-BE-NEXT: .byte 0
; CHECK-BE-NEXT: .byte 0
; CHECK-BE-NEXT: .byte 0
; CHECK-BE-NEXT: .byte 0
; CHECK-BE-NEXT: .byte 0
; CHECK-BE-NEXT: .byte 0
; CHECK-BE-NEXT: .byte 0
; CHECK-BE-NEXT: .byte 1
; CHECK-BE-NEXT: .byte 0
; CHECK-BE-NEXT: .byte 0
; CHECK-BE-NEXT: .byte 0
; CHECK-BE-NEXT: .byte 0
; CHECK-BE-NEXT: .byte 0
; CHECK-BE-NEXT: .byte 0
; CHECK-BE-NEXT: .byte 2
; CHECK-BE-NEXT: .byte 3
; CHECK-BE: addi [[REG1:r[0-9]+]], {{r[0-9]+}}, .LCPI5_0@toc@l
; CHECK-BE: lxvx [[REG2:v[0-9]+]], 0, [[REG1]]
; CHECK-BE: vperm [[REG3:v[0-9]+]], {{v[0-9]+}}, {{v[0-9]+}}, [[REG2]]
; CHECK-BE: vextsh2d [[REG4:v[0-9]+]], [[REG3]]
; CHECK-BE: xvcvsxddp {{vs[0-9]+}}, [[REG4]]
}
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